Honeywell CT8775C Support Question
Honeywell CT8775C Support Question
Find answers below for this question about Honeywell CT8775C.Need a Honeywell CT8775C manual? We have 1 online manual for this item!
Question posted by sruderman on February 10th, 2017
Screen Came On But Is Now Blank And Furnace Is Not Operating. Honeywell Ct8775c
the thermostat came on and furnace came on and then went blankremoved faceplate, waited 5 minutes turned dial to heat and auto and turned up tempcame on then went blank again
Current Answers
Related Honeywell CT8775C Manual Pages
Owner's Manual - Page 1
... en español, por favor visite nuestro sitio de web a: www.honeywell.com/yourhome. OWNER'S GUIDE
Contents
Step 1. Remove Old Thermostat ...4 Step 3. Wire Wallplate Terminals...8 Step 8. Registered Trademark • Patents Pending Copyright © 2004 Honeywell International Inc. Check Operation of Heating and/or Cooling System 13 If You Have A Problem ...15 Wiring Diagrams...
Owner's Manual - Page 2
...Honeywell thermostat -
Failure to use.
COOLER
WARMER
ROOM SET
M19582
MERCURY SWITCH
TYPICAL LOCATION OF A MERCURY SWITCH IN A THERMOSTAT
M10614
69-1676-1
2 Enjoy the benefits of The Digital RoundTM Thermostat by Honeywell... NOTICE
If this thermostat is replacing a control that can damage the product or cause a hazardous condition. Turn the dial to adjust the temperature setting...
Owner's Manual - Page 3
...PREPARE FOR INSTALLATION
❑ Check Table 1, the compatibility chart, to make sure the thermostat is not compatible, call Honeywell Customer Care, toll-free, 1-800-468-1502.
System Type Gas or Oil Warm Air... volt)b Single Stage Heat Pump Multistage Heat Pumps/Multistage Equipment
Compatibility with CT8775A
Yes No Yesa Yes Yes No No No
No No
Compatibility with CT8775C
Yes Yes Yesa Yes...
Owner's Manual - Page 4
... electrical tape. Continue with the operation of the special installations apply to your local heating/air-conditioning dealer. Replacing a thermostat that is connected to six or more wires (excluding wires connected to the system at the furnace or the fuse/circuit breaker panel. ❑ Carefully unpack your system, call Honeywell Customer Care, at Step 4. If...
Owner's Manual - Page 5
... to three wires on a zoned hot water heating system
If you are replacing a thermostat that is connected to ON, the CT8775C Thermostat will only work with the installation at the right. As you disconnect each wire, attach the enclosed labels with this application. SEPARATE WALLPLATE FROM THERMOSTAT
❑ Remove cover from falling back into the wall...
Owner's Manual - Page 6
...the wall with the screw holes on the
decorator cover plate. Turn
1 INCH
the wallplate until they are aligned and
SCREW (2)
...decorator cover plate (if used ) wallplate directly to wall (heating-cooling wallplate
and drill two 3/16 in the middle of ...69-1676-1
6 Mount decorator cover plate (optional) and
❑ Remove the wallplate and decorator cover plate (if used ) and wallplate over...
Owner's Manual - Page 7
...LE TROU DE
MONTAGE «A». Mount decorator cover plate (required) and wallplate onto electrical box (heating-cooling wallplate
shown).
7
69-1676-1 screws.
❑ Pull the wires through the wiring hole on...cover plate to the decorator cover plate with the two 3/8 in .
MF19494
Fig. 2.
Turn the wallplate until the wiring holes are aligned and the two screw holes on the left ...
Owner's Manual - Page 8
Refer to help prevent drafts from
adversely affecting thermostat operation. Tighten the terminals. ❑ Plug the hole in the ...when you removed the
Y
old thermostat (see illustration). IMPORTANT Remove the factory-installed jumper connecting terminals R and Rc on the CT8775C Thermostat if wires will be connected to the labels you placed on your local
R
heating/air conditioning...
Owner's Manual - Page 9
...R to Rc.
2.
Transformer common
Do not continue
Do not continue
Second stage heat.
installation. Call 1-800468-1502. Terminal Designations on CT8775C
R
R (see Note 2)
Power
Description
-
Connect O to both Rh and R terminals on the old thermostat, remove jumper between R and Rc on the new thermostat, remove jumper between R and Rc. 3.
Second stage cool. cal tape and do...
Owner's Manual - Page 10
... switch 1, 2 and 3 on the wallplate (see Fig. 3).
DIP switch.
10 Fuel switch. The fuel switch is factory set the switch to your particular heating system.
See Fig. 4. See Table 3. STEP 8. CUSTOMIZE THE THERMOSTAT
Set Fuel Switch (CT8775C Only)
❑ To adjust the fuel switch, locate the switch labeled E/F on the back of the...
Owner's Manual - Page 11
... Table 4. MOUNT THE THERMOSTAT
ENGAGE TABS AT BOTTOM OF THERMOSTAT AND WALL PLATE. Heating System
Cycles Per Hour DIP Switch 1 DIP Switch 2
Steam, Gravity
1
High Efficiency Warm Air (90%+ efficiency), Hot Water, Heat Pump 3
On
On
Off
On
Gas or Oil Warm Air (factory setting) Electric Warm Air In Floor Radiant Heat
6
Off
Off
9
On...
Owner's Manual - Page 12
.... CT8775 Thermostat (features and operation).
12
STEP 10. Fan Switch (see Fig. 5)
❑ Heat: The thermostat controls your heating system. ❑ Off: Both the heating and cooling systems are off. ❑ Cool: The thermostat controls your cooling system. Use for most homes. SET THE SYSTEM AND FAN SWITCHES (CT8775C ONLY)
System Switch (see Fig. 5)
❑ Fan Auto: Normal...
Owner's Manual - Page 13
... to Auto (CT8775C only). ❑ Turn the dial clockwise to raise the temperature setting several degrees above the room temperature. ❑ A flame will switch to indicate the thermostat has ended the call for heating. Display Temperature Setting
❑ Turn the dial one click to indicate the thermostat has called for heating.
STEP 11. OPERATING THE THERMOSTAT
NOTE: Batteries...
Owner's Manual - Page 14
... fan should turn on.
❑ Turn the dial clockwise to raise the temperature setting above the room temperature. ❑ The snowflake will display a solid snowflake to protect the compressor. Do not operate cooling when outside temperature is running, the thermostat will go into a five-minute delay to indicate the thermostat has called for five minutes before the compressor...
Owner's Manual - Page 15
...refer to On if it is in the On position, and
set it to Heat (CT8775C only). • Make sure the temperature setting is above the room temperature. ...position. • Wait five minutes for this has been checked, contact your local heating and cooling contractor. If...
Before calling, please have the following information available:
• Thermostat model number. (...
Owner's Manual - Page 16
... RELAY OR VALVE COIL
FAN RELAY
1 POWER SUPPLY.
Wiring Diagrams
R W
1
HEATING
RELAY OR
VALVE COIL
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M19451
69-1676-1
O
B
2 Rc
G
R
Y
W
1
HEATING
COMPRESSOR FAN
RELAY OR VALVE COIL
CONTACTOR RELAY
1 POWER SUPPLY. M19452
16 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2 FACTORY...
Owner's Manual - Page 17
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2 REMOVE FACTORY INSTALLED JUMPER BETWEEN R AND RC. M19454
Notice:
This thermostat is a Class B digital apparatus that complies with Canadian Radio Interference Regulations, CRC c. 1374.
17
69-1676-1
4
O
Rc 2
R
B G Y3 W
COMPRESSOR CONTACTOR
HEAT CHANGEOVER
VALVE
1
FAN
COOL
RELAY
CHANGEOVER VALVE
1 POWER SUPPLY. O
B...
Owner's Manual - Page 18
...IS HEREBY LIMITED TO THE ONE YEAR DURATION OF THIS WARRANTY.
MN10-3860
Honeywell Limited/Honeywell Limitée
1885 Douglas Drive North
35 Dynamic Drive
Golden Valley, MN 55422-3992...Scarborough, Ontario M1V 4Z9
This warranty does not cover removal or reinstallation costs. THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT.
This warranty gives you ...
Owner's Manual - Page 20
Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario
M1V 4Z9
69-1676-1 J.S. Automation and Control Solutions
Honeywell International Inc. Rev. 6-04
www.honeywell.com/yourhome
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